Attachment for squares



(No Model.) 2 Sheets-Sheet 2. J. KLIP.

ATTACHMENT FOR SQUARES.

Patented July 12,1887.

WITNESSES INVENTOR ATTORNEYS.

UNITED STAT S J ABEZ KLIF, OF FERGUS FALLS, MINNESOTA.

ATTACHMENT FOR SQUARES.

SPECIFICATION forming part of Letters Patent No. 366,404, dated July 12, 1887.-

Application filed January 6, 1867. Serial No. 223,558.

To all whom it may concern.-

Be it known that 1, J ABEZ KLIF, of Fergus Falls, in the county of Otter Tail andState of Minnesota, have invented a new and Improved Measuringlnstrument, of which the following is a full, clear, and exact description.

The object of myinvention is to provide a new and improved measuring-instrument especially adapted for the use of carpenters, Stairbuilders, 85c.

The invention consists of a square and two slotted straightedges adapted to be fastened on the said square by means of bolts.

The invention also consists of various parts and details and combinations of the same, as will be fully described hereinafter, and then pointed out in the claims.

Reference is to be had to the accompanying drawings, forming part of this specification, in which similar letters of reference indicate corresponding parts in all the figures.

Figure 1 is a face view of my improvement as applied for finding the center of a circle. Fig. 2 is an edge view of the same. Fig. 3 is a face View of my improvement, showing it applied for laying out mortises. Fig. 4 is a face view of a modified form of my improvement adapted for laying out radial lines of cylinders, and Fig. 5 is a face view ofa modified form of my improvement adapted for laying out stair-stringers.

My instrument is provided with a square, A, having the usual arms, B and 0, each pro vided with a slot, B'or C, respectively, in its middle, of which the slot 0 extends from near the outer end to the middle of the other arm, B, as shown plainly in Fig. 3.

On the square A are placed two straightedges or rules, D and E, each having a central slot, D or E, respectively, and offset-grooves D and E at each side of the said respective slots D and E. Through the slots in the square and in the straight-edges pass the bolts F, by which the said square and the straightedges are held together. The bolts F, with their respective heads, can be easily removed from or placed on the said square and straightedges by passing the same through the enlarged round apertures formed at the outer ends of the slots in thesaid square and the PATENT OFFICE,

(No model.)

straight-edges. The heads of the bolts F are held in the grooves D and E and do not project above the respective faces.

The faces of the square A are provided with the usual graduation of inches and subdivisions of the same, and one of the straight-edges is provided on its underside with a lumbermeasure, and the other straight-edge is pro vided on its under side with an octagon meas' ure or points. The upper faces ofbotlistraightedges D and E are marked with the usual graduations of inches and subdivisions of the same.

The instrumentis used as follows: For obtaining the center of a circle, I fasten the straightedge E upon, the arms 13 and G of the square A by means of two bolts and at an angle of fortyfive degrees, as shown in Fig. 1. I then fasten the other straightedge, D,with one bolt, F, to the arm B of the square by inserting the said bolt into an aperture, B in the said arm 13, so that when one edge of the said straight-edge Dis placed at the junction of the inner edges of the square-arms B and C, as shown in Fig.

1, then the straight'edgc D stands at an angle of forty-live degrees to both arms and at right angles to the other straight-edge, E. The cen ter of any given circle can then be found, as the straight-edge D will always pass through the center of the circle when the inner edges of the arms B and O are placed as tangents ol' the circle, as shown in Fig. 1. The exact center is then easily marked bythe otherstraight edge.

For laying out mortises, I arrange the instrument,as shown in Fig.3,by placing one straightedge, E, at right angles to the arm B of the square A,and the otherstraight-cdge,D, at right angles to the other arm, 0, and then fasten the straight-edges together at their junction by a bolt, F. The straight-edges are placcd at such distances apart as to correspond with the sizes of the mortises and with the distances that the mortises should be apart. Thelatter are then marked off on the inner edges of the arms of the square, and on the inner edges of the straight-edges, as shown in Fig. 3.

For laying out radial lines of a cylinder, I attach upon one of the-straight-edgcs D the head I, provided on each side with a slot, 1, ICO

inwhich is held, by means of abolt, K, ashort slotted arm, J, having its inner end rounded OH. The arms J are set parallel to the straightedge D, which is at right angles to the head I, 5 and the said arms J are placed at equal distances from one of the edges of the straightedge D, so that when the instrument is applied internally or externally to a cylinder, as shownin Fig. 4, then one edge of the straight edge D will mark the radial lines of the said cylinder. It can also be usedas a T-square.

For layingout stair-stringers, I use both the straight-edges and the square, as shown in Fig. 5, and Iset the straight-edges D and E to the pitch of the stringer, and the arms of the squarehorizontally and vertically, respectively, so that the outer edges of the arms serve to mark the vertical and horizontal lines for the steps, while one edge of the straight-edges rests against the stringer, as shown in Fig. 5. The straight-edges D and E are placed over each other and are used as one straight-edge.

I may also use a square without slots and fasten the straight-edges on the arms of the square, as shown in Fig. 5, bypassing the bolts F through the rules near the edge of the square. The instrument may be used in variousother ways-such as ascertaining the height of a building, length of rafters, braces, 85c.

Having thus fully described my invention, I

claim as new and desire to secure by Letters the slots D and E, respectively, and the grooves D and E, respectively, and the bolts F, for fastening the said square and straight-edges together, substantially as shown and described.

JABEZ KLIF.

Witnesses:

P. A. NORMAN, ANDREW PETERSON. 

